1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Generate kernel symbol version hashes.
3 Copyright 1996, 1997 Linux International.
4
5 New implementation contributed by Richard Henderson <rth@tamu.edu>
6 Based on original work by Bjorn Ekwall <bj0rn@blox.se>
7
8 This file was part of the Linux modutils 2.4.22: moved back into the
9 kernel sources by Rusty Russell/Kai Germaschewski.
10
11 */
12
13 #include <stdio.h>
14 #include <string.h>
15 #include <stdlib.h>
16 #include <unistd.h>
17 #include <assert.h>
18 #include <stdarg.h>
19 #include <getopt.h>
20
21 #include "genksyms.h"
22 /*----------------------------------------------------------------------*/
23
24 #define HASH_BUCKETS 4096
25
26 static struct symbol *symtab[HASH_BUCKETS];
27 static FILE *debugfile;
28
29 int cur_line = 1;
30 char *cur_filename;
31 int in_source_file;
32
33 static int flag_debug, flag_dump_defs, flag_reference, flag_dump_types,
34 flag_preserve, flag_warnings;
35
36 static int errors;
37 static int nsyms;
38
39 static struct symbol *expansion_trail;
40 static struct symbol *visited_symbols;
41
42 static const struct {
43 int n;
44 const char *name;
45 } symbol_types[] = {
46 [SYM_NORMAL] = { 0, NULL},
47 [SYM_TYPEDEF] = {'t', "typedef"},
48 [SYM_ENUM] = {'e', "enum"},
49 [SYM_STRUCT] = {'s', "struct"},
50 [SYM_UNION] = {'u', "union"},
51 [SYM_ENUM_CONST] = {'E', "enum constant"},
52 };
53
54 static int equal_list(struct string_list *a, struct string_list *b);
55 static void print_list(FILE * f, struct string_list *list);
56 static struct string_list *concat_list(struct string_list *start, ...);
57 static struct string_list *mk_node(const char *string);
58 static void print_location(void);
59 static void print_type_name(enum symbol_type type, const char *name);
60
61 /*----------------------------------------------------------------------*/
62
63 static const unsigned int crctab32[] = {
64 0x00000000U, 0x77073096U, 0xee0e612cU, 0x990951baU, 0x076dc419U,
65 0x706af48fU, 0xe963a535U, 0x9e6495a3U, 0x0edb8832U, 0x79dcb8a4U,
66 0xe0d5e91eU, 0x97d2d988U, 0x09b64c2bU, 0x7eb17cbdU, 0xe7b82d07U,
67 0x90bf1d91U, 0x1db71064U, 0x6ab020f2U, 0xf3b97148U, 0x84be41deU,
68 0x1adad47dU, 0x6ddde4ebU, 0xf4d4b551U, 0x83d385c7U, 0x136c9856U,
69 0x646ba8c0U, 0xfd62f97aU, 0x8a65c9ecU, 0x14015c4fU, 0x63066cd9U,
70 0xfa0f3d63U, 0x8d080df5U, 0x3b6e20c8U, 0x4c69105eU, 0xd56041e4U,
71 0xa2677172U, 0x3c03e4d1U, 0x4b04d447U, 0xd20d85fdU, 0xa50ab56bU,
72 0x35b5a8faU, 0x42b2986cU, 0xdbbbc9d6U, 0xacbcf940U, 0x32d86ce3U,
73 0x45df5c75U, 0xdcd60dcfU, 0xabd13d59U, 0x26d930acU, 0x51de003aU,
74 0xc8d75180U, 0xbfd06116U, 0x21b4f4b5U, 0x56b3c423U, 0xcfba9599U,
75 0xb8bda50fU, 0x2802b89eU, 0x5f058808U, 0xc60cd9b2U, 0xb10be924U,
76 0x2f6f7c87U, 0x58684c11U, 0xc1611dabU, 0xb6662d3dU, 0x76dc4190U,
77 0x01db7106U, 0x98d220bcU, 0xefd5102aU, 0x71b18589U, 0x06b6b51fU,
78 0x9fbfe4a5U, 0xe8b8d433U, 0x7807c9a2U, 0x0f00f934U, 0x9609a88eU,
79 0xe10e9818U, 0x7f6a0dbbU, 0x086d3d2dU, 0x91646c97U, 0xe6635c01U,
80 0x6b6b51f4U, 0x1c6c6162U, 0x856530d8U, 0xf262004eU, 0x6c0695edU,
81 0x1b01a57bU, 0x8208f4c1U, 0xf50fc457U, 0x65b0d9c6U, 0x12b7e950U,
82 0x8bbeb8eaU, 0xfcb9887cU, 0x62dd1ddfU, 0x15da2d49U, 0x8cd37cf3U,
83 0xfbd44c65U, 0x4db26158U, 0x3ab551ceU, 0xa3bc0074U, 0xd4bb30e2U,
84 0x4adfa541U, 0x3dd895d7U, 0xa4d1c46dU, 0xd3d6f4fbU, 0x4369e96aU,
85 0x346ed9fcU, 0xad678846U, 0xda60b8d0U, 0x44042d73U, 0x33031de5U,
86 0xaa0a4c5fU, 0xdd0d7cc9U, 0x5005713cU, 0x270241aaU, 0xbe0b1010U,
87 0xc90c2086U, 0x5768b525U, 0x206f85b3U, 0xb966d409U, 0xce61e49fU,
88 0x5edef90eU, 0x29d9c998U, 0xb0d09822U, 0xc7d7a8b4U, 0x59b33d17U,
89 0x2eb40d81U, 0xb7bd5c3bU, 0xc0ba6cadU, 0xedb88320U, 0x9abfb3b6U,
90 0x03b6e20cU, 0x74b1d29aU, 0xead54739U, 0x9dd277afU, 0x04db2615U,
91 0x73dc1683U, 0xe3630b12U, 0x94643b84U, 0x0d6d6a3eU, 0x7a6a5aa8U,
92 0xe40ecf0bU, 0x9309ff9dU, 0x0a00ae27U, 0x7d079eb1U, 0xf00f9344U,
93 0x8708a3d2U, 0x1e01f268U, 0x6906c2feU, 0xf762575dU, 0x806567cbU,
94 0x196c3671U, 0x6e6b06e7U, 0xfed41b76U, 0x89d32be0U, 0x10da7a5aU,
95 0x67dd4accU, 0xf9b9df6fU, 0x8ebeeff9U, 0x17b7be43U, 0x60b08ed5U,
96 0xd6d6a3e8U, 0xa1d1937eU, 0x38d8c2c4U, 0x4fdff252U, 0xd1bb67f1U,
97 0xa6bc5767U, 0x3fb506ddU, 0x48b2364bU, 0xd80d2bdaU, 0xaf0a1b4cU,
98 0x36034af6U, 0x41047a60U, 0xdf60efc3U, 0xa867df55U, 0x316e8eefU,
99 0x4669be79U, 0xcb61b38cU, 0xbc66831aU, 0x256fd2a0U, 0x5268e236U,
100 0xcc0c7795U, 0xbb0b4703U, 0x220216b9U, 0x5505262fU, 0xc5ba3bbeU,
101 0xb2bd0b28U, 0x2bb45a92U, 0x5cb36a04U, 0xc2d7ffa7U, 0xb5d0cf31U,
102 0x2cd99e8bU, 0x5bdeae1dU, 0x9b64c2b0U, 0xec63f226U, 0x756aa39cU,
103 0x026d930aU, 0x9c0906a9U, 0xeb0e363fU, 0x72076785U, 0x05005713U,
104 0x95bf4a82U, 0xe2b87a14U, 0x7bb12baeU, 0x0cb61b38U, 0x92d28e9bU,
105 0xe5d5be0dU, 0x7cdcefb7U, 0x0bdbdf21U, 0x86d3d2d4U, 0xf1d4e242U,
106 0x68ddb3f8U, 0x1fda836eU, 0x81be16cdU, 0xf6b9265bU, 0x6fb077e1U,
107 0x18b74777U, 0x88085ae6U, 0xff0f6a70U, 0x66063bcaU, 0x11010b5cU,
108 0x8f659effU, 0xf862ae69U, 0x616bffd3U, 0x166ccf45U, 0xa00ae278U,
109 0xd70dd2eeU, 0x4e048354U, 0x3903b3c2U, 0xa7672661U, 0xd06016f7U,
110 0x4969474dU, 0x3e6e77dbU, 0xaed16a4aU, 0xd9d65adcU, 0x40df0b66U,
111 0x37d83bf0U, 0xa9bcae53U, 0xdebb9ec5U, 0x47b2cf7fU, 0x30b5ffe9U,
112 0xbdbdf21cU, 0xcabac28aU, 0x53b39330U, 0x24b4a3a6U, 0xbad03605U,
113 0xcdd70693U, 0x54de5729U, 0x23d967bfU, 0xb3667a2eU, 0xc4614ab8U,
114 0x5d681b02U, 0x2a6f2b94U, 0xb40bbe37U, 0xc30c8ea1U, 0x5a05df1bU,
115 0x2d02ef8dU
116 };
117
118 static unsigned long partial_crc32_one(unsigned char c, unsigned long crc)
119 {
120 return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8);
121 }
122
123 static unsigned long partial_crc32(const char *s, unsigned long crc)
124 {
125 while (*s)
126 crc = partial_crc32_one(*s++, crc);
127 return crc;
128 }
129
130 static unsigned long crc32(const char *s)
131 {
132 return partial_crc32(s, 0xffffffff) ^ 0xffffffff;
133 }
134
135 /*----------------------------------------------------------------------*/
136
137 static enum symbol_type map_to_ns(enum symbol_type t)
138 {
139 switch (t) {
140 case SYM_ENUM_CONST:
141 case SYM_NORMAL:
142 case SYM_TYPEDEF:
143 return SYM_NORMAL;
144 case SYM_ENUM:
145 case SYM_STRUCT:
146 case SYM_UNION:
147 return SYM_STRUCT;
148 }
149 return t;
150 }
151
152 struct symbol *find_symbol(const char *name, enum symbol_type ns, int exact)
153 {
154 unsigned long h = crc32(name) % HASH_BUCKETS;
155 struct symbol *sym;
156
157 for (sym = symtab[h]; sym; sym = sym->hash_next)
158 if (map_to_ns(sym->type) == map_to_ns(ns) &&
159 strcmp(name, sym->name) == 0 &&
160 sym->is_declared)
161 break;
162
163 if (exact && sym && sym->type != ns)
164 return NULL;
165 return sym;
166 }
167
168 static int is_unknown_symbol(struct symbol *sym)
169 {
170 struct string_list *defn;
171
172 return ((sym->type == SYM_STRUCT ||
173 sym->type == SYM_UNION ||
174 sym->type == SYM_ENUM) &&
175 (defn = sym->defn) && defn->tag == SYM_NORMAL &&
176 strcmp(defn->string, "}") == 0 &&
177 (defn = defn->next) && defn->tag == SYM_NORMAL &&
178 strcmp(defn->string, "UNKNOWN") == 0 &&
179 (defn = defn->next) && defn->tag == SYM_NORMAL &&
180 strcmp(defn->string, "{") == 0);
181 }
182
183 static struct symbol *__add_symbol(const char *name, enum symbol_type type,
184 struct string_list *defn, int is_extern,
185 int is_reference)
186 {
187 unsigned long h;
188 struct symbol *sym;
189 enum symbol_status status = STATUS_UNCHANGED;
190 /* The parser adds symbols in the order their declaration completes,
191 * so it is safe to store the value of the previous enum constant in
192 * a static variable.
193 */
194 static int enum_counter;
195 static struct string_list *last_enum_expr;
196
197 if (type == SYM_ENUM_CONST) {
198 if (defn) {
199 free_list(last_enum_expr, NULL);
200 last_enum_expr = copy_list_range(defn, NULL);
201 enum_counter = 1;
202 } else {
203 struct string_list *expr;
204 char buf[20];
205
206 snprintf(buf, sizeof(buf), "%d", enum_counter++);
207 if (last_enum_expr) {
208 expr = copy_list_range(last_enum_expr, NULL);
209 defn = concat_list(mk_node("("),
210 expr,
211 mk_node(")"),
212 mk_node("+"),
213 mk_node(buf), NULL);
214 } else {
215 defn = mk_node(buf);
216 }
217 }
218 } else if (type == SYM_ENUM) {
219 free_list(last_enum_expr, NULL);
220 last_enum_expr = NULL;
221 enum_counter = 0;
222 if (!name)
223 /* Anonymous enum definition, nothing more to do */
224 return NULL;
225 }
226
227 h = crc32(name) % HASH_BUCKETS;
228 for (sym = symtab[h]; sym; sym = sym->hash_next) {
229 if (map_to_ns(sym->type) == map_to_ns(type) &&
230 strcmp(name, sym->name) == 0) {
231 if (is_reference)
232 /* fall through */ ;
233 else if (sym->type == type &&
234 equal_list(sym->defn, defn)) {
235 if (!sym->is_declared && sym->is_override) {
236 print_location();
237 print_type_name(type, name);
238 fprintf(stderr, " modversion is "
239 "unchanged\n");
240 }
241 sym->is_declared = 1;
242 return sym;
243 } else if (!sym->is_declared) {
244 if (sym->is_override && flag_preserve) {
245 print_location();
246 fprintf(stderr, "ignoring ");
247 print_type_name(type, name);
248 fprintf(stderr, " modversion change\n");
249 sym->is_declared = 1;
250 return sym;
251 } else {
252 status = is_unknown_symbol(sym) ?
253 STATUS_DEFINED : STATUS_MODIFIED;
254 }
255 } else {
256 error_with_pos("redefinition of %s", name);
257 return sym;
258 }
259 break;
260 }
261 }
262
263 if (sym) {
264 struct symbol **psym;
265
266 for (psym = &symtab[h]; *psym; psym = &(*psym)->hash_next) {
267 if (*psym == sym) {
268 *psym = sym->hash_next;
269 break;
270 }
271 }
272 --nsyms;
273 }
274
275 sym = xmalloc(sizeof(*sym));
276 sym->name = name;
277 sym->type = type;
278 sym->defn = defn;
279 sym->expansion_trail = NULL;
280 sym->visited = NULL;
281 sym->is_extern = is_extern;
282
283 sym->hash_next = symtab[h];
284 symtab[h] = sym;
285
286 sym->is_declared = !is_reference;
287 sym->status = status;
288 sym->is_override = 0;
289
290 if (flag_debug) {
291 if (symbol_types[type].name)
292 fprintf(debugfile, "Defn for %s %s == <",
293 symbol_types[type].name, name);
294 else
295 fprintf(debugfile, "Defn for type%d %s == <",
296 type, name);
297 if (is_extern)
298 fputs("extern ", debugfile);
299 print_list(debugfile, defn);
300 fputs(">\n", debugfile);
301 }
302
303 ++nsyms;
304 return sym;
305 }
306
307 struct symbol *add_symbol(const char *name, enum symbol_type type,
308 struct string_list *defn, int is_extern)
309 {
310 return __add_symbol(name, type, defn, is_extern, 0);
311 }
312
313 static struct symbol *add_reference_symbol(const char *name, enum symbol_type type,
314 struct string_list *defn, int is_extern)
315 {
316 return __add_symbol(name, type, defn, is_extern, 1);
317 }
318
319 /*----------------------------------------------------------------------*/
320
321 void free_node(struct string_list *node)
322 {
323 free(node->string);
324 free(node);
325 }
326
327 void free_list(struct string_list *s, struct string_list *e)
328 {
329 while (s != e) {
330 struct string_list *next = s->next;
331 free_node(s);
332 s = next;
333 }
334 }
335
336 static struct string_list *mk_node(const char *string)
337 {
338 struct string_list *newnode;
339
340 newnode = xmalloc(sizeof(*newnode));
341 newnode->string = xstrdup(string);
342 newnode->tag = SYM_NORMAL;
343 newnode->next = NULL;
344
345 return newnode;
346 }
347
348 static struct string_list *concat_list(struct string_list *start, ...)
349 {
350 va_list ap;
351 struct string_list *n, *n2;
352
353 if (!start)
354 return NULL;
355 for (va_start(ap, start); (n = va_arg(ap, struct string_list *));) {
356 for (n2 = n; n2->next; n2 = n2->next)
357 ;
358 n2->next = start;
359 start = n;
360 }
361 va_end(ap);
362 return start;
363 }
364
365 struct string_list *copy_node(struct string_list *node)
366 {
367 struct string_list *newnode;
368
369 newnode = xmalloc(sizeof(*newnode));
370 newnode->string = xstrdup(node->string);
371 newnode->tag = node->tag;
372
373 return newnode;
374 }
375
376 struct string_list *copy_list_range(struct string_list *start,
377 struct string_list *end)
378 {
379 struct string_list *res, *n;
380
381 if (start == end)
382 return NULL;
383 n = res = copy_node(start);
384 for (start = start->next; start != end; start = start->next) {
385 n->next = copy_node(start);
386 n = n->next;
387 }
388 n->next = NULL;
389 return res;
390 }
391
392 static int equal_list(struct string_list *a, struct string_list *b)
393 {
394 while (a && b) {
395 if (a->tag != b->tag || strcmp(a->string, b->string))
396 return 0;
397 a = a->next;
398 b = b->next;
399 }
400
401 return !a && !b;
402 }
403
404 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
405
406 static struct string_list *read_node(FILE *f)
407 {
408 char buffer[256];
409 struct string_list node = {
410 .string = buffer,
411 .tag = SYM_NORMAL };
412 int c, in_string = 0;
413
414 while ((c = fgetc(f)) != EOF) {
415 if (!in_string && c == ' ') {
416 if (node.string == buffer)
417 continue;
418 break;
419 } else if (c == '"') {
420 in_string = !in_string;
421 } else if (c == '\n') {
422 if (node.string == buffer)
423 return NULL;
424 ungetc(c, f);
425 break;
426 }
427 if (node.string >= buffer + sizeof(buffer) - 1) {
428 fprintf(stderr, "Token too long\n");
429 exit(1);
430 }
431 *node.string++ = c;
432 }
433 if (node.string == buffer)
434 return NULL;
435 *node.string = 0;
436 node.string = buffer;
437
438 if (node.string[1] == '#') {
439 size_t n;
440
441 for (n = 0; n < ARRAY_SIZE(symbol_types); n++) {
442 if (node.string[0] == symbol_types[n].n) {
443 node.tag = n;
444 node.string += 2;
445 return copy_node(&node);
446 }
447 }
448 fprintf(stderr, "Unknown type %c\n", node.string[0]);
449 exit(1);
450 }
451 return copy_node(&node);
452 }
453
454 static void read_reference(FILE *f)
455 {
456 while (!feof(f)) {
457 struct string_list *defn = NULL;
458 struct string_list *sym, *def;
459 int is_extern = 0, is_override = 0;
460 struct symbol *subsym;
461
462 sym = read_node(f);
463 if (sym && sym->tag == SYM_NORMAL &&
464 !strcmp(sym->string, "override")) {
465 is_override = 1;
466 free_node(sym);
467 sym = read_node(f);
468 }
469 if (!sym)
470 continue;
471 def = read_node(f);
472 if (def && def->tag == SYM_NORMAL &&
473 !strcmp(def->string, "extern")) {
474 is_extern = 1;
475 free_node(def);
476 def = read_node(f);
477 }
478 while (def) {
479 def->next = defn;
480 defn = def;
481 def = read_node(f);
482 }
483 subsym = add_reference_symbol(xstrdup(sym->string), sym->tag,
484 defn, is_extern);
485 subsym->is_override = is_override;
486 free_node(sym);
487 }
488 }
489
490 static void print_node(FILE * f, struct string_list *list)
491 {
492 if (symbol_types[list->tag].n) {
493 putc(symbol_types[list->tag].n, f);
494 putc('#', f);
495 }
496 fputs(list->string, f);
497 }
498
499 static void print_list(FILE * f, struct string_list *list)
500 {
501 struct string_list **e, **b;
502 struct string_list *tmp, **tmp2;
503 int elem = 1;
504
505 if (list == NULL) {
506 fputs("(nil)", f);
507 return;
508 }
509
510 tmp = list;
511 while ((tmp = tmp->next) != NULL)
512 elem++;
513
514 b = alloca(elem * sizeof(*e));
515 e = b + elem;
516 tmp2 = e - 1;
517
518 (*tmp2--) = list;
519 while ((list = list->next) != NULL)
520 *(tmp2--) = list;
521
522 while (b != e) {
523 print_node(f, *b++);
524 putc(' ', f);
525 }
526 }
527
528 static unsigned long expand_and_crc_sym(struct symbol *sym, unsigned long crc)
529 {
530 struct string_list *list = sym->defn;
531 struct string_list **e, **b;
532 struct string_list *tmp, **tmp2;
533 int elem = 1;
534
535 if (!list)
536 return crc;
537
538 tmp = list;
539 while ((tmp = tmp->next) != NULL)
540 elem++;
541
542 b = alloca(elem * sizeof(*e));
543 e = b + elem;
544 tmp2 = e - 1;
545
546 *(tmp2--) = list;
547 while ((list = list->next) != NULL)
548 *(tmp2--) = list;
549
550 while (b != e) {
551 struct string_list *cur;
552 struct symbol *subsym;
553
554 cur = *(b++);
555 switch (cur->tag) {
556 case SYM_NORMAL:
557 if (flag_dump_defs)
558 fprintf(debugfile, "%s ", cur->string);
559 crc = partial_crc32(cur->string, crc);
560 crc = partial_crc32_one(' ', crc);
561 break;
562
563 case SYM_ENUM_CONST:
564 case SYM_TYPEDEF:
565 subsym = find_symbol(cur->string, cur->tag, 0);
566 /* FIXME: Bad reference files can segfault here. */
567 if (subsym->expansion_trail) {
568 if (flag_dump_defs)
569 fprintf(debugfile, "%s ", cur->string);
570 crc = partial_crc32(cur->string, crc);
571 crc = partial_crc32_one(' ', crc);
572 } else {
573 subsym->expansion_trail = expansion_trail;
574 expansion_trail = subsym;
575 crc = expand_and_crc_sym(subsym, crc);
576 }
577 break;
578
579 case SYM_STRUCT:
580 case SYM_UNION:
581 case SYM_ENUM:
582 subsym = find_symbol(cur->string, cur->tag, 0);
583 if (!subsym) {
584 struct string_list *n;
585
586 error_with_pos("expand undefined %s %s",
587 symbol_types[cur->tag].name,
588 cur->string);
589 n = concat_list(mk_node
590 (symbol_types[cur->tag].name),
591 mk_node(cur->string),
592 mk_node("{"),
593 mk_node("UNKNOWN"),
594 mk_node("}"), NULL);
595 subsym =
596 add_symbol(cur->string, cur->tag, n, 0);
597 }
598 if (subsym->expansion_trail) {
599 if (flag_dump_defs) {
600 fprintf(debugfile, "%s %s ",
601 symbol_types[cur->tag].name,
602 cur->string);
603 }
604
605 crc = partial_crc32(symbol_types[cur->tag].name,
606 crc);
607 crc = partial_crc32_one(' ', crc);
608 crc = partial_crc32(cur->string, crc);
609 crc = partial_crc32_one(' ', crc);
610 } else {
611 subsym->expansion_trail = expansion_trail;
612 expansion_trail = subsym;
613 crc = expand_and_crc_sym(subsym, crc);
614 }
615 break;
616 }
617 }
618
619 {
620 static struct symbol **end = &visited_symbols;
621
622 if (!sym->visited) {
623 *end = sym;
624 end = &sym->visited;
625 sym->visited = (struct symbol *)-1L;
626 }
627 }
628
629 return crc;
630 }
631
632 void export_symbol(const char *name)
633 {
634 struct symbol *sym;
635
636 sym = find_symbol(name, SYM_NORMAL, 0);
637 if (!sym)
638 error_with_pos("export undefined symbol %s", name);
639 else {
640 unsigned long crc;
641 int has_changed = 0;
642
643 if (flag_dump_defs)
644 fprintf(debugfile, "Export %s == <", name);
645
646 expansion_trail = (struct symbol *)-1L;
647
648 sym->expansion_trail = expansion_trail;
649 expansion_trail = sym;
650 crc = expand_and_crc_sym(sym, 0xffffffff) ^ 0xffffffff;
651
652 sym = expansion_trail;
653 while (sym != (struct symbol *)-1L) {
654 struct symbol *n = sym->expansion_trail;
655
656 if (sym->status != STATUS_UNCHANGED) {
657 if (!has_changed) {
658 print_location();
659 fprintf(stderr, "%s: %s: modversion "
660 "changed because of changes "
661 "in ", flag_preserve ? "error" :
662 "warning", name);
663 } else
664 fprintf(stderr, ", ");
665 print_type_name(sym->type, sym->name);
666 if (sym->status == STATUS_DEFINED)
667 fprintf(stderr, " (became defined)");
668 has_changed = 1;
669 if (flag_preserve)
670 errors++;
671 }
672 sym->expansion_trail = 0;
673 sym = n;
674 }
675 if (has_changed)
676 fprintf(stderr, "\n");
677
678 if (flag_dump_defs)
679 fputs(">\n", debugfile);
680
681 printf("#SYMVER %s 0x%08lx\n", name, crc);
682 }
683 }
684
685 /*----------------------------------------------------------------------*/
686
687 static void print_location(void)
688 {
689 fprintf(stderr, "%s:%d: ", cur_filename ? : "<stdin>", cur_line);
690 }
691
692 static void print_type_name(enum symbol_type type, const char *name)
693 {
694 if (symbol_types[type].name)
695 fprintf(stderr, "%s %s", symbol_types[type].name, name);
696 else
697 fprintf(stderr, "%s", name);
698 }
699
700 void error_with_pos(const char *fmt, ...)
701 {
702 va_list args;
703
704 if (flag_warnings) {
705 print_location();
706
707 va_start(args, fmt);
708 vfprintf(stderr, fmt, args);
709 va_end(args);
710 putc('\n', stderr);
711
712 errors++;
713 }
714 }
715
716 static void genksyms_usage(void)
717 {
718 fputs("Usage:\n" "genksyms [-adDTwqhVR] > /path/to/.tmp_obj.ver\n" "\n"
719 " -d, --debug Increment the debug level (repeatable)\n"
720 " -D, --dump Dump expanded symbol defs (for debugging only)\n"
721 " -r, --reference file Read reference symbols from a file\n"
722 " -T, --dump-types file Dump expanded types into file\n"
723 " -p, --preserve Preserve reference modversions or fail\n"
724 " -w, --warnings Enable warnings\n"
725 " -q, --quiet Disable warnings (default)\n"
726 " -h, --help Print this message\n"
727 " -V, --version Print the release version\n"
728 , stderr);
729 }
730
731 int main(int argc, char **argv)
732 {
733 FILE *dumpfile = NULL, *ref_file = NULL;
734 int o;
735
736 struct option long_opts[] = {
737 {"debug", 0, 0, 'd'},
738 {"warnings", 0, 0, 'w'},
739 {"quiet", 0, 0, 'q'},
740 {"dump", 0, 0, 'D'},
741 {"reference", 1, 0, 'r'},
742 {"dump-types", 1, 0, 'T'},
743 {"preserve", 0, 0, 'p'},
744 {"version", 0, 0, 'V'},
745 {"help", 0, 0, 'h'},
746 {0, 0, 0, 0}
747 };
748
749 while ((o = getopt_long(argc, argv, "dwqVDr:T:ph",
750 &long_opts[0], NULL)) != EOF)
751 switch (o) {
752 case 'd':
753 flag_debug++;
754 break;
755 case 'w':
756 flag_warnings = 1;
757 break;
758 case 'q':
759 flag_warnings = 0;
760 break;
761 case 'V':
762 fputs("genksyms version 2.5.60\n", stderr);
763 break;
764 case 'D':
765 flag_dump_defs = 1;
766 break;
767 case 'r':
768 flag_reference = 1;
769 ref_file = fopen(optarg, "r");
770 if (!ref_file) {
771 perror(optarg);
772 return 1;
773 }
774 break;
775 case 'T':
776 flag_dump_types = 1;
777 dumpfile = fopen(optarg, "w");
778 if (!dumpfile) {
779 perror(optarg);
780 return 1;
781 }
782 break;
783 case 'p':
784 flag_preserve = 1;
785 break;
786 case 'h':
787 genksyms_usage();
788 return 0;
789 default:
790 genksyms_usage();
791 return 1;
792 }
793 {
794 extern int yydebug;
795 extern int yy_flex_debug;
796
797 yydebug = (flag_debug > 1);
798 yy_flex_debug = (flag_debug > 2);
799
800 debugfile = stderr;
801 /* setlinebuf(debugfile); */
802 }
803
804 if (flag_reference) {
805 read_reference(ref_file);
806 fclose(ref_file);
807 }
808
809 yyparse();
810
811 if (flag_dump_types && visited_symbols) {
812 while (visited_symbols != (struct symbol *)-1L) {
813 struct symbol *sym = visited_symbols;
814
815 if (sym->is_override)
816 fputs("override ", dumpfile);
817 if (symbol_types[sym->type].n) {
818 putc(symbol_types[sym->type].n, dumpfile);
819 putc('#', dumpfile);
820 }
821 fputs(sym->name, dumpfile);
822 putc(' ', dumpfile);
823 if (sym->is_extern)
824 fputs("extern ", dumpfile);
825 print_list(dumpfile, sym->defn);
826 putc('\n', dumpfile);
827
828 visited_symbols = sym->visited;
829 sym->visited = NULL;
830 }
831 }
832
833 if (flag_debug) {
834 fprintf(debugfile, "Hash table occupancy %d/%d = %g\n",
835 nsyms, HASH_BUCKETS,
836 (double)nsyms / (double)HASH_BUCKETS);
837 }
838
839 if (dumpfile)
840 fclose(dumpfile);
841
842 return errors != 0;
843 }
844
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